MTC 968 Replacement Battery 3.7V 1500mAh Li-ion

MTC 968 — 3.7V Li-ion 1500mAh Replacement Battery

This is a 3.7V, 1500mAh lithium-ion replacement battery for the MTC 968 smartphone. It slots directly into the 968's battery bay and restores power to a phone that has seen capacity fade or a dead cell. Dimensions are 64.60 × 43.95 × 5.10mm — verify your bay size before ordering.

• MTC 968 fit: The 968 runs a single-cell 3.7V nominal rail. This cell matches that voltage and physical footprint. The connector pinout carries the thermistor line the phone's charge IC uses to monitor cell temperature during charging.
• Bench tested on actual hardware: We cycled this cell through full charge and discharge on a smartphone test rig. The BMS held charge termination correctly at 4.2V and did not trip the low-voltage cutoff prematurely under a simulated screen-plus-modem load.
• First-cycle fast charge disable: On first use after installation, turn off fast charging for one full discharge-charge cycle. This lets the fuel gauge IC recalibrate its coulomb counter against the new cell's discharge curve before high-current charging pushes into an uncalibrated cell.

Sudden shutdown at 20–30% on the MTC 968 after a cell swap

The 968's fuel gauge IC stores a charge curve calibrated to the original cell. After a swap, the stored curve no longer matches the new cell's actual voltage-capacity relationship. When modem transmission or screen brightness spikes current draw, the cell voltage drops faster than the gauge expects — the phone reads 25% but the cell is already near cutoff. The fix is one complete discharge to auto-shutdown, then a full charge to 100% without interruption, which forces the coulomb counter to resync to the new cell.

MTC 968 not powering on after the replacement cell sat in storage

Lithium-ion cells self-discharge in storage, and if a new cell drops below roughly 2.5V, the BMS enters lockout mode and blocks charging to prevent thermal runaway on a deeply discharged cell. The phone shows nothing on screen and appears completely dead. Connect the charger and leave it for 15–20 minutes without pressing the power button — the charge IC trickle-charges the cell back above the BMS re-enable threshold, typically around 2.8–3.0V. Once the phone shows a charging icon, normal charging can resume.